Caterpillar Performance Handbook, January 2017, SEBD0351-47

Blade Selection ● Production DozingTools

Bulldozers

19

● General Purpose DozingTools

● Special Application DozingTools

“CD” — The CD or Carry- Dozer Blade is available for the D11T CarryDozer only. It is built to the same high standard of structural inte- grity as the “U” and “SU” Dozers. The CD Blade has

Variable Radius (VR) Blades

Variable Radius Semi-U Blades are excellent tools for land im- provement, soil conservation, site development or general construction. They combine the penetration ability of a Semi-U Blade with the load reten- tion and high capacity of a U-blade. They provide the aggressive cutting action needed for digging, while having the material retention charac- teristics needed for moving high volumes over a distance. This is accomplished through a moldboard which varies in radius from the edge to the center. This creates a roll- ing action in the material being moved, pushing it to the center of the blade for better retention. The extended side wings, angled to thirty degrees, further increase the capacity over a standard blade. Angle Blade (A-Blade)

a unique “bucket” shape that allows it to carry several cubic yards or cubic meters of material in the blade. This acts as a disposable counterweight that allows the CarryDozer to push more material per pass than a standard D11T. The CarryDozer will not be as effective as the “U” or “SU” dozer in tightly packed or poorly shot material. It is also more sensitive to the carry- back in sticky materials. General Purpose DozingTools

“S” — The Straight blade provides excellent versa- tility. Since it is physically smaller than the SU or U- blade, it is easier to maneu- ver and can handle a wider range of materials. It has a higher kW/ meter (HP/foot)

“A” — Or Angling blade can be positioned straight or angled 25 degrees to either side. It is designed for side- casting, pioneering roads,

backfilling, cutting ditches and other similar tasks. It can reduce the amount of maneuvering required to do these jobs. Its “C” frame can be used for attachments such as pushing, land clearing, or snow removal tools. A-blades are not recommended for rock or severe applications. Cushion Dozers

of cutting edge than the SU or U-blade; consequently, the “S” is more aggressive in penetrating and obtaining a blade load. A tilt cylinder increases both the produc- tivity and versatility of this dozer. With a high kW/Lm 3 (HP/LCY), the S-blade can handle heavy material easily. Power Angle and Tilt Blade — Versatility is its key feature with its abil- ity to perform a variety of site development to general dozing work as well as heavy-duty appli- cations. Angle and tilt control is with 2 levers on some machines, 1 lever on others. Variable Power Angle and Tilt (VPAT) blade can be mechanically tipped forward for improved penetration or shedding sticky material and backward for finish grading and improved productivity. Special Application DozingTools Caterpillar provides specialty bulldozers for specific applications. The blades are designed to increase production while performing certain tasks. Following are the most popular special applications blades.

C u s h i o n D o z e r s a r e designed to push-load wheel-tractor scrapers, or track-type tractors. The heavy-duty design includes reinforcement to transfer machine power without damaging the blade or the

tractor. Blade cylinders are pinned to the C-frame, and the blade height is such that the blade lift cylinders are isolated from damaging forces.

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